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Texas Instruments SN74ABT2827NTG4
- Part No.:
- SN74ABT2827NTG4
- Manufacturer:
- Texas Instruments
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74ABT2827NTG4.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,527
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Product details
Overview
SN74ABT2827NTG4 from Texas Instruments is a 10-bit noninverting buffer/driver with 3-state outputs, designed for high-speed bus interface in wide data paths carrying parity. It operates from 4.5 V to 5.5 V, supports –40°C to 85°C ambient, delivers ±12 mA output drive, and integrates 25-Ω series output resistors to suppress overshoot/undershoot in 5-V TTL systems.
For engineers reviewing the SN74ABT2827NTG4 datasheet, SN74ABT2827NTG4 pinout, SN74ABT2827NTG4 application, or SN74ABT2827NTG4 equivalent, key selection criteria include dual active-low 3-state enable control (OE1/OE2), flow-through pinout for optimized PCB layout, latch-up immunity >500 mA per JESD-17, ground bounce <1 V at 5 V, and SOIC-24 (NT) package compatibility with standard DIP footprints.
Technical Context
The SN74ABT2827NTG4 implements a true-output, noninverting 10-bit bus driver with dual 2-input AND-gated 3-state control: both OE1 and OE2 must be low for output enable; either high forces all ten Y outputs into high-impedance. Its EPIC-IIB BiCMOS process enables low power dissipation while maintaining TTL-compatible voltage thresholds (VIL = 0.8 V, VVIH = 2 V) and fast switching (tPLH/tPHL ≤ 5.5 ns at 5 V, CL = 50 pF).
Each output is internally series-terminated with 25 Ω, eliminating external termination resistors. The device features flow-through architecture-A1–A10 on one side, Y1–Y10 on the opposite-with OE1/OE2 adjacent to GND/VCC for noise-resilient enable routing. Absolute maximum ratings include 7-V supply tolerance and 128-mA low-state output current capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures robust operation across industrial 5-V rail tolerances without level-shifting. |
| Operating Temperature | –40°C to +85°C - Qualified for commercial and industrial environments without derating. |
| Output Drive | ±12 mA - Sustains full TTL fanout (up to 10 LSTTL loads) with controlled edge rates. |
| Propagation Delay | ≤5.5 ns (A→Y, 5 V, CL = 50 pF) - Enables reliable timing in sub-100-MHz parallel bus systems. |
| 3-State Enable Logic | Active-low AND gate (OE1 ∧ OE2) - Guarantees fail-safe high-Z during power sequencing if either enable floats high. |
| Output Series Resistance | 25 Ω (integrated) - Reduces signal reflections and EMI without requiring external components or board space. |
| Latch-Up Immunity | >500 mA per JESD-17 - Withstands transient overcurrent events in noisy industrial backplanes. |
Pinout & Package
SN74ABT2827NTG4 is packaged in a 24-pin plastic DIP (NT), with through-hole mounting and 0.3-inch body width. Pin 1 is marked by a notch or dot; the package is RoHS-compliant and rated MSL-1 (unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24 | OE1, OE2 | Active-low 3-state enable inputs - Dual control allows hierarchical bus gating or redundancy. |
| 2–11 | A1–A10 | Noninverting data inputs - Flow-through arrangement minimizes trace crossovers on dense PCBs. |
| 12 | GND | Ground reference - Shared with all input/output circuitry; requires low-inductance connection. |
| 13 | VCC | Positive supply - Bypassing with 0.1 µF ceramic near pin reduces switching noise coupling. |
| 14–23 | Y1–Y10 | True 3-state outputs - Each includes 25-Ω series resistor; capable of sourcing/sinking 12 mA. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω series output resistors | Eliminates need for 20 external termination resistors, reducing BOM count and layout complexity. |
| Flow-through pinout (A-side / Y-side) | Enables straight-layer PCB routing with minimal vias, lowering signal path inductance and crosstalk. |
| Dual active-low 3-state enable (OE1, OE2) | Provides fail-safe bus isolation during power-up/down; pull-up to VCC ensures default high-Z state. |
| EPIC-IIB BiCMOS process | Combines bipolar speed and CMOS low static power: ICC disabled < 250 µA, enabling low-idle-power bus buffering. |
| Output ground bounce < 1 V | Ensures logic-level integrity during simultaneous switching of all 10 outputs at 5 V. |
Applications
| Industrial Backplane Bus Interface | Legacy System Data Path Expansion |
|---|---|
Use Scenario: Interfacing a microcontroller's 10-bit address/data bus to a multi-slot industrial backplane with long trace runs and shared ground planes. IC Role / Device Role / Timing Role: Bidirectional bus driver isolating master and slave modules while maintaining signal integrity across 15-cm traces. Use Value: Integrated 25-Ω termination suppresses ringing caused by impedance mismatch, eliminating external resistors and saving 20 placement locations. | Use Scenario: Upgrading a 1990s-era test equipment mainboard with extended memory addressing using TTL-compatible peripherals. IC Role / Device Role / Timing Role: Noninverting buffer amplifying and retiming legacy 5-V parallel signals between FPGA I/O banks and discrete logic chips. Use Value: 5.5-ns max propagation delay ensures setup/hold timing margins are preserved at 20-MHz bus clock rates. |
| Parity-Checked Memory Subsystem | Modular PLC I/O Carrier Board |
Use Scenario: Driving 10-bit data + parity lines from a memory controller to SRAM chips in a fault-tolerant embedded system. IC Role / Device Role / Timing Role: True-output buffer ensuring bit-for-bit signal fidelity while enabling/disabling the entire data path via dual OE control. Use Value: Latch-up immunity >500 mA protects against ESD-induced latch-up during hot-swap insertion of memory modules. | Use Scenario: Isolating field I/O signals (digital inputs/outputs) from a central PLC CPU board using modular carrier cards. IC Role / Device Role / Timing Role: 3-state bus driver allowing multiple I/O modules to share a common diagnostics or configuration bus. Use Value: Dual OE inputs permit independent module enable/disable without software coordination, simplifying firmware design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT2827DW | Same die, SOIC-24 package (surface-mount); thermal resistance θJA = 81°C/W vs NT's 67°C/W. | Requires reflow assembly instead of through-hole; better suited for automated SMT lines. | Select SN74ABT2827DW for volume production with pick-and-place; retain SN74ABT2827NTG4 for prototyping or legacy through-hole designs. |
| SN74ACT2827N | ACT-family variant: lower drive (±24 mA), higher speed (tP ≤ 4.5 ns), but no integrated 25-Ω resistors. | Requires external termination; less tolerant of unterminated stubs in backplane layouts. | Choose SN74ACT2827N only when maximum speed is critical and board layout allows precise external termination. |
Compared with SN74ABT2827NTG4, SN74ABT2827DW offers identical electrical performance in a surface-mount form factor ideal for high-density boards, while SN74ACT2827N trades integrated termination for marginally faster edges-making SN74ABT2827NTG4 the optimal choice for robust, low-component-count 5-V bus interfacing.
Availability
SN74ABT2827NTG4 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system upgrades, parity-checked memory subsystems, and modular PLC I/O carrier boards requiring stable component supply and long-term obsolescence management.
Supply support for SN74ABT2827NTG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and logic solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The ABT logic family-including SN74ABT2827NTG4-is engineered for high-speed, low-noise 5-V TTL bus interfacing in mission-critical industrial, telecom, and computing infrastructure where signal integrity and latch-up immunity are essential.
FAQ
What is the recommended power-up sequence for SN74ABT2827NTG4 to ensure reliable 3-state behavior?
TI recommends tying both OE1 and OE2 to VCC via a pullup resistor (value determined by driver sink capability) during power-up to guarantee all outputs remain in high-impedance until valid control signals are established. This prevents bus contention on the SN74ABT2827NTG4 outputs during voltage ramp-up. The SN74ABT2827NTG4 datasheet specifies this as mandatory for safe initialization.
Does SN74ABT2827NTG4 require external termination resistors for clean signal transmission?
No. The SN74ABT2827NTG4 integrates 25-Ω series resistors on all ten Y outputs, explicitly designed to reduce overshoot and undershoot in typical 5-V TTL bus environments. TI documentation confirms "no external resistors are required" - a key differentiator from earlier ABT or ACT families that lack on-die termination.
What is the maximum output current rating for SN74ABT2827NTG4 in the low state, and under what conditions is it specified?
The SN74ABT2827NTG4 is rated for 128 mA low-state output current (IOL) under absolute maximum conditions at VCC = 5.5 V. However, for continuous operation within recommended limits, the device sustains ±12 mA per output (IO = ±12 mA) at VCC = 4.5 V to 5.5 V - sufficient for driving 10 LSTTL loads without thermal derating.
How does the dual 3-state enable (OE1 and OE2) logic function in SN74ABT2827NTG4?
The SN74ABT2827NTG4 uses an internal 2-input AND gate with active-low inputs: both OE1 and OE2 must be low to enable outputs; if either is high, all ten Y outputs enter high-impedance. This architecture allows hierarchical bus control - for example, OE1 may serve as global enable while OE2 acts as local module select - and provides inherent fail-safe behavior during power transitions.
Is SN74ABT2827NTG4 compatible with 3.3-V logic systems?
No. The SN74ABT2827NTG4 is a 5-V-only device with input thresholds (VIL = 0.8 V, VIH = 2.0 V) and output levels (VOH ≥ 2.4 V at IOH = –12 mA) specified strictly for 4.5–5.5 V operation. It lacks 3.3-V tolerance and must not be directly interfaced to 3.3-V controllers without level translation, as confirmed in the recommended operating conditions table.
SN74ABT2827NTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 10
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 24-PDIP
SN74ABT2827NTG4 FAQ
1.How can I place an order for SN74ABT2827NTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT2827NTG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74ABT2827NTG4 reliable?
The price and inventory of SN74ABT2827NTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT2827NTG4 is usually 5 days.
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Once your SN74ABT2827NTG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74ABT2827NTG4?
For technical support, including SN74ABT2827NTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT2827NTG4 requirements.
6.How does Aetrix verify that SN74ABT2827NTG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT2827NTG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74ABT2827NTG4 meets industry standards.
7.What is the process for return or replacement of SN74ABT2827NTG4?
All SN74ABT2827NTG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT2827NTG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74ABT2827NTG4 part is unused and in its original packaging.
Return procedure for SN74ABT2827NTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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